The rise time test (along with the settleometer procedure) is used to monitor sludge behavior in the secondary clarifier of an activated sludge system. The test monitors the effect of the nitrification/denitrification process and aids the operator in determining optimum clarifier sludge detention time and, to some extent, optimum degree of…

This is the second in a series of documents developed by the National Training and Operational Technology Center describing operational control procedures for the activated sludge process used in wastewater treatment. This document deals exclusively with the calculation procedures, including simplified mixing formulas, aeration tank…

The determination of the thickness of a sludge blanket in primary and secondary clarifiers and in gravity thickness is important in making operational control decisions. Knowing the thickness and concentration will allow the operator to determine sludge volume and detention time. Designed for individuals who have completed National Pollutant…

This teacher research study examines the literary talk and classroom community that emerged during Book Club meetings, fishbowl discussions, and a Retrospective Reflection session which transpired in my fifth grade classroom over the course of two thematic units. Themes of cultural awareness and belonging served to help students flesh out social…

Creative Problem Solving (CPS), a well-documented methodology for developing creative-thinking skills, has often been the focus of studies that have examined the impact of creativity training. The purpose of the present study was to extend this line of research in two ways. The first objective was to evaluate participants' reactions to specific…

This student manual contains the textual material for a seven-lesson unit on activated sludge. Topic areas addressed in the lessons include: (1) activated sludge concepts and components (including aeration tanks, aeration systems, clarifiers, and sludge pumping systems); (2) activated sludge variations and modes; (3) biological nature of activated…

This instructor's guide contains the materials needed to teach a seven-lesson unit on activated sludge. These materials include an overview of the unit, lesson plans, lecture outlines (keyed to slides designed for use with the lessons), student worksheets for each of the seven lessons (with answers), and two copies of a final quiz (with and…

This paper discusses cooperative learning, a technique in which students work in small heterogeneous learning groups. Following a definition of cooperative learning, the paper describes the most widely used cooperative learning methods, including Student Teams-Achievement Divisions (STAD), Teams-Games-Tournament (TGT), Jigsaw, Learning Together,…

The textual material for a unit on trickling filters is presented in this student manual. Topic areas discussed include: (1) trickling filter process components (preliminary treatment, media, underdrain system, distribution system, ventilation, and secondary clarifier); (2) operational modes (standard rate filters, high rate filters, roughing…

The settleometer test is used to indicate the solids-liquid separation (downtime) capability of sludge, most commonly on activated sludge entering the secondary clarifier and aerobic digesters. Designed for individuals who have completed National Pollutant Discharge Elimination System (NPDES) level 1 laboratory training skills, this module…

The jar test is used to determine the proper chemical dosage required for good coagulation and flocculation of water. The test is commonly used in potable water, secondary effluent prior to advanced wastewater treatment, secondary clarifier influent, and sludge conditioning practice. Designed for individuals who have completed National Pollutant…

Past approaches to public administration, the diminishing distinctions between foreign and domestic policy, the role of the public administrator, and leadership qualities are discussed. As a relatively young discipline, public administration first focused on scientific management (1920's). It then shifted to the art and science of getting things…

Variables which affect the experiential style of learning are reality, risk, responsibility, predictability, and analysis or reflection. Learning retention is dependent on the amount of reality involved, the directness of the experience, and the number of senses involved. The learner must also experience uncertainty. In experiential learning, the…

The pragmatic use of nicknames as clarifiers separates the Maltese usage from those so common throughout the world where the nickname is used as a means of hiding identity. The familial character of most nicknames in Malta suggests they are the vestiges of a pre-Christian naming system. The major peculiarity in Malta is in the intermingling of…

In Ontario, the attainment of nitrification (oxidation of ammonia) in activated sludge plants is receiving increased attention. Nitrification of waste water is a necessary requirement because it reduces plant discharge of nitrogenous oxygen demand and/or toxic ammonia. However, this new requirement will result in added responsibility for…